you need to look for an obit for max and becky to learn more. Maybe there was some info in julius's obit also or his brothers". try at nyplibrary.
Did edward have any cousins that you can find?if unknown ,look at uncles obit for thier names.
'there is a;lways some story someone remembers.
Any pictures to jog memories...bibles,papers,ketuba,certificates,temple records..